exam Maths Puzzle Numerical Ability

How do I write the function of a line with the equation : y=6x+7 ??

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exam Other Question

Please help. My worksheet asks the following question.

Refer to this division problem:

x-6 divided by x+4 divided by x+7 divided by x+5

x+6/x+4 divided by x+7/x+5

Not e Rosa is 18 years old and Arthur is 24 years old. How many years ago was Arthur three times as old as Rosa?